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Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 1 of 10
PIPING FLEXIBILITY ANALYSIS
PIPING SYSTEM
SK-026
PREPARED FOR
By:Iv-Oil & Gas b.v
Rev. Description Date By Checked Appr’d by
R1 For DNV Comments / Approval 11-07-2005 H.v.d.Weele R. Tjin M. van Neck
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 2 of 10
Rev. Description Date By Checked Appr’d by
R1 For DNV Comments / Approval 11-07-2005 H.v.d.Weele R. Tjin M. van Neck
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 3 of 10
TABLE OF CONTENTS Page
INTRODUCTION................................................................................................................................................. 31.1 SCOPE OF WORK.............................................................................................................................. 31.2 APPLICABLE CODES......................................................................................................................... 31.3 REFERENCE DOCUMENTS..............................................................................................................3
2. SYSTEM DESIGN.......................................................................................................................................... 42.1 LINE DATA........................................................................................................................................... 42.2 CII Calculations.................................................................................................................................... 42.3 DESIGN LOAD CASES........................................................................................................................ 52.4 ALLOWABLE STRESSES...................................................................................................................62.5 BLAST CALCULATIONS..................................................................................................................... 62.6 PIPE SUPPORTS................................................................................................................................ 72.7 FLANGE CONNECTIONS...................................................................................................................72.8 NOZZLE LOADS.................................................................................................................................. 7
3. STRESS ANALYSIS...................................................................................................................................... 83.1 COMPUTER MODEL........................................................................................................................... 8
4. ANALYSIS RESULTS................................................................................................................................... 94.1 STRESSES.......................................................................................................................................... 94.2 FLANGES............................................................................................................................................ 94.3 NOZZLE LOADS.................................................................................................................................. 9
APPENDICES
APPENDIX 1 STRESS SKETCHES
APPENDIX 2 PIPE SUPPORT DETAILED DRAWINGS
APPENDIX 3 CONSTRUCTION ISOMETRICS
APPENDIX 4 MISCELLANEOUS CALCULATIONS
APPENDIX 5 CAESAR II PRINTOUT
APPENDIX 6 NOZZLE LOADS
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 4 of 10
INTRODUCTION
1.1 SCOPE OF WORK
The purpose of this report is to demonstrate that piping system SK-026, part of De Ruyter topside piping, has inherent flexibility to accommodate displacements due to design conditions, without imposing any excessive loads on pipe supports and equipment nozzles. Furthermore the piping stress level has to satisfy the designated code.
1.2 APPLICABLE CODES
The governing code for piping design is:
ASME B31.3 Process Piping
For items not covered by the above-mentioned document, reference is made to the following codes and standards:
ASME VIII Rules for construction of pressure vessels, Division 1 and 2
ASME III Rules for Construction of Nuclear Facility Components, Division 1
ASME B16.5 Pipe Flanges and Flanged Fittings
WRC-107 Local stresses in Spherical and Cylindrical Shells due to External loadings
1.3 REFERENCE DOCUMENTS
144-002-PI-SPE-0002 Piping Classes Specifications
144-002-PI-SPE-0007 Plant Department Pipe Stress Design Criteria
144-111-PI-LST-0001 Plant Department Critical Line List
144-000-PR-LST-0001 Process Line List
144-000-ME-SPE-0004 Nozzle Loads on Equipment
144-002-HE-TNS-0007 Blast Design Strategy and Overpressures
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 5 of 10 2. SYSTEM DESIGN
2.1 LINE DATA
Functional design data, used for analysis, is summarised below:
Item/ Line No.
Pipe
Cla
ss
Cor
rosi
on
Allo
wan
ce
Des
ign
Pres
sure
Hyd
rote
st P
ress
ure
Max
imum
Des
ign
Tem
pera
ture
Min
imum
Des
ign
Tem
pera
ture
Ope
ratin
g Te
mp.
Med
ium
Den
sity
Flan
ge R
atin
g
Drawing Number
- mm barg barg °C °C °C Kg/m3 # -
16”-BD-410-224-A42-V A42 3 15 22.5 140 -46 40 10 150 410224-0301
16”-BD-410-200-A41-V A41 3 15 22.5 140 -11 50 10 150410200-
0301/0302/0303
12”-BD-410-221-A41-V A41 3 15 22.5 140 -11 50 10 150 410221-0601
8”-BD-410-223-A42-V A42 3 15 22.5 100 -46 50 10 150 410223-0301
8”-BD-410-234-A41-V A41 3 15 22.5 100 -11 50 10 150 410234-0601
12”-BD-410-010-A41-V A41 3 15 22.5 100 -11 60 10 150 410010-0201
12”-BD-410-013-A41-V A41 3 15 22.5 85 -11 75 10 150 410013-0201
12”-BD-410-146-A41-V A41 3 15 22.5 100 -11 60 10 150 410146-0301
Note: Installation temperature assumed as -11°C throughout.
2.2 CII CALCULATIONS
The following CII calculations have been performed:
SK-026A-R1 : Design conditions
SK-026B-R1 : Blast loads
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 6 of 10
2.3 DESIGN LOAD CASES
The Functional Loads, used to generate the design load cases, comprise the following:
(W) Gravity load, due to self-weight of steel, contents and insulation.
(P1) Pressure load, due to design pressure.
(T1) Thermal load due to bypass at minimum and other at maximum design temperature.
(T2) Thermal load due to minimum design temperature (all piping).
(WIN1..4) Wind loads based on 42m/s velocity at 10m (100 year - 3 sec’s gust). Loads are applied in +X for Case 1, -X for Case2, +Z for Case 3 and –Z for Case 4.
(H) Hanger load.
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 7 of 10
2.4 ALLOWABLE STRESSES
The allowable stresses are in compliance with the criteria specified in ASME B31.3
Material Max temp [ºC ]
Material Properties [N/ mm²]
Allowable stresses [N/mm²]
SMTS SMYS Sh Sa (EXP) Socc (OCC)
A333 Gr. 6 140 414 241138 207 183
Sustained Stress range Occasional
Note : Stress range is based on a stress reduction factor (f) of 1.
2.5 BLAST CALCULATIONS
The blast critical piping has been identified as per doc. no 144-002-HE-TNS-0007, table C1. HP Flare KO Drum 410-VA-01 Nozzle N1 and lines 16””-BD-410-200-A41-V; 8”-BD-410-223-A42-V are blast critical. Blast loads are applied to complete model. For deck deflection assumed blast between EL+18000 and EL+26000.
Blast Load: 20 KN/m2
Shape factor: 0.9 (conservative approach resulting in approximately 20% safety margin).
The blast loads are generated using CII wind modeler. The loads are applied in four (4) directions as described in section 2.3, above.A shape factor of 0.9 has been used (conservative approach).
Pipe supports are designed for blast loads for complete model.
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 8 of 10
2.6 PIPE SUPPORTS
All loads on supports are summarised in the Pipe Stress Analysis Output.
The loads include the friction forces. In general a friction coefficient of 0.4 is taken into account for friction between steel surfaces. In special cases where PTFE-sliding pads may be applied a friction coefficient of 0.1 shall be taken into account. The pipe support detail drawings are included in Appendix 2.
2.7 FLANGE CONNECTIONS
Flange connections are modelled in CAESAR II by anchoring together the rigid elements through a CNODE. This enables an easy check of the external loads using CII restraint output summary.
For B16.5 flange analysis, either of the following two methods has been used:
1. External loads acting on these connections are assessed using the ASME BPVC, Section VIII, Division 1, Appendix 2 in combination with Section III, subsection NC. Actual hub length is used.
2. External loads acting on these connections are assessed using the ASME Section III, Division 1, subsection NC-3658.3, ASME B16.5a Flanged Joints with High Strength Bolting, with yield stress at temperature, SY, substituted with B31.3 allowable stress, Sh.
Flange analysis is performed for maximum acting loads and calculations are performed for each flange size in the calculation.
2.8 NOZZLE LOADS
External loads acting on pressure vessel nozzles are compared against the allowable load sheet. In the event that the allowable loads are exceeded, manufacturer’s acceptance is obtained for the higher loads or WRC-107 calculations are carried out.
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 9 of 10 3. STRESS ANALYSIS
3.1 COMPUTER MODELFinite element computer models are developed based on the stress isometric included in Appendix 1.
Pipe stress program CAESAR II version 4.50, developed and marketed by COADE Engineering Software has been used for the analysis of the piping systems. This software package is a widely accepted tool to perform comprehensive stress analysis of complex piping systems.
The global co-ordinate system used in the computer model is indicated on the stress isometrics. Small differences in dimensions between the piping isometrics and the calculations may occur, but have no significant effect on the analysis.
The pipe routing of this system is shown below:
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 10 of 10 4. ANALYSIS RESULTS
4.1 STRESSES
The maximum calculated code stresses are summarized below and compared against B31.3 code allowable values. For blast case the calculation method set in document no144-002-PI-SPE-0007 was used. The calculated 3D stress intensities are compared with yield at operating temperature (230N/mm2) multiplied by 4/.
All stresses are found to be within the allowable limits.
Table 4.1.1 Maximum Sustained Stress (SK-026A-R1)
Case No. Node MaterialCode Stress
N/mm²
Allowable Stress
N/mm²
Ratio
8 110 A333 Gr. 6 52.3 137.9 0.38
Table 4.1.2 Maximum Stress Range (SK-026A-R1)
Case No. Node MaterialCode Stress
N/mm²
Allowable Stress
N/mm²
Ratio
20 110 A333 Gr. 6 127.1 207 0.61
Table 4.1.3 Maximum Occasional Stress – Wind effects (SK-026A-R1)
Case No. Node MaterialCode Stress
N/mm²
Allowable Stress
N/mm²
Ratio
21 147 A333 Gr. 6 59.5 183 0.32
Table 4.1.4 3D Stresses – Blast effects (SK-026B-R1)
Case No. Node Material3D Stress
N/mm²
Allowable Stress
N/mm²
Ratio
10 147 A333 Gr. 6 245.3 292 0.84
4.2 FLANGES
The integrity of the ASME B16.5 flanges, under the maximum external loads, has been checked as outlined in section 2.7. The external loads are found to be acceptable. Detailed flange calculations and the summary have been included in Appendix 4 where required.
4.3 NOZZLE LOADS
The maximum external nozzle loads are listed below and compared with the allowable values. In case nozzle loads exceed the allowable values, the applicable cases are listed separate, showing only the maximum combinations for bending and / or torsion.
Note: Forces in [N] and moments in [Nm]
Project No : 040176
PIPING FLEXIBILITY ANALYSIS
Client : Petro Canada
Project : De Ruyter Production Platform
Location : P11-b
Document number: 144-111-PI-CAL-026 Rev. no : R1 Page : 11 of 10
Table 4.3.1 Vessel 410-VA- 01 / N1
Design Case
Size Calc. No. Node No.
Fx Fy Fz Mx My Mz
16”-150# SK-026A-R1 10 4285 12422 15784 12363 11487 9075
Allowable values 11000 11000 10500 11500 10000 22000
Blast Case
Size Calc. No. Node No.
Fx Fy Fz Mx My Mz
16”-150# SK-026B-R1 10 29352 10621 39549 14080 23380 11384
Allowable values 22000 22000 21000 123000 20000 44000
Nozzle loads have been submitted for verification and approved by the vendor (refer Appendix 6).
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-026 Rev. no : R1
APPENDIX 1
STRESS SKETCHES
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-026 Rev. no : R1
APPENDIX 2
PIPE SUPPORT DETAILED DRAWINGS
Hold for node: 300310330340370400410
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-026 Rev. no : R1
APPENDIX 3
CONSTRUCTION ISOMETRICS
Hold for: 410221-0601
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-026 Rev. no : R1
APPENDIX 4
MISCELLANEOUS CALCULATIONS
Project no : 040176
Client : Petro Canada
Project title : De Ruyter Production Platform
Location : P11-b
PIPING FLEXIBILITY ANALYSIS
Document number : 144-111-PI-CAL-026 Rev. no : R1
APPENDIX 5
CAESAR II PRINTOUT
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